A device which controls the voltage and current being delivered to a capacitor or battery.

learn more… | top users | synonyms

1
vote
1answer
37 views

Solar charging using or not using a dummy (dump) load

I'm in the process of designing a small solar regulator / charger (no more than 5A) for sealed lead acid batteries. I have put a working prototype together and all seems to be working. However, ...
0
votes
1answer
39 views

Phone charger project [on hold]

I have a question, how to make a led that changing light from red to green and when the led turn green a buzzer will trigger? I want to make a phone charger project, that when the phone fully charged ...
0
votes
1answer
31 views

Can a device be charged with a charger that has a lower current output than the original? [closed]

I have a phone. The original charger was 1.0 A. This one is 0.7 A. A laptop USB port shows 0.5 A. Shouldn't the laptop damage the device more than the 0.7 A charger, since I know that the output ...
0
votes
0answers
22 views

How to rewire a 6-port usb charging hub

For a project in school I am building a product which displays and charges any device which can run from a usb port. The problem is that I have the holes for the usb ports cut out of custom positions ...
0
votes
1answer
36 views

Operation of a micro USB phone charger outside its limits

Many micro USB phone chargers give 5V DC and 1500 mA output at input 100-240 V AC at 50-60 Hz (these values are from a Sony EP 880 charger). What happens to the output when voltage rises above 240 and ...
0
votes
2answers
51 views

Triac circuit confusion

X1Iz.png I have the following questions about the above circuit: -Why are we even using a trica/diac combo above. Why would a circuit consisting of just the fuse, switch and primary not be ...
0
votes
1answer
69 views

Looking for circuit diagrams of current mobile phone chargers [closed]

I am writing an investigation into how a mobile phone charger works and I'm required to break down the internals with a block diagram with component explanations. To help get me on track I'm looking ...
-1
votes
0answers
46 views

Automatic Battery Charger Circuit. Not getting proper output

i have tried to make a circuit from electronics hub. but the LEDs in the circuit is not glowing. But the circuit is ok charging is doing well. Any problem with this circuit ? please help ?
0
votes
0answers
52 views

Solar panel - voltage regulator

I am contemplating the possibility to run a trolling motor (to push my canoe) with a 250W solar panel. Electrical Specifications: Peak power: 250 W (minus 0, plus 5W Tolerance!) Optimum operating ...
-1
votes
0answers
58 views

Battery Charger

I am working in a industry where we have a battery bank connected with a battery charger in usually in charging mode but whenever black out occurs at that time by using battery we can provide a power ...
0
votes
1answer
41 views

Solar Charge Controller Function Details

I am planning to make this controller: I would like to understand the way the components work to switch from charging to dumping and vice versa at set points. Note that the 555 timer is not being ...
1
vote
1answer
27 views

Will the charging current decrease due to a higher input resistance?

I am trying to design a board with USB powered linear battery charger IC charging a 3.7v Li-ion battery. I am concerning about the the relationship between charging path resistance and the maximum ...
0
votes
1answer
150 views

What happens if you put the connector of a live charger in your mouth?

So what exactly would happen if you put the connector of a plugged-in charger in your mouth? I am sure it is a bad idea but can it really hurt or even kill you? Some posts on social media led me to ...
0
votes
0answers
26 views

Finish of charging

Is it possible to determine the fact charger has finished it's work (accumulator unplugged or charged) by any metrics in AC circuit? History of metrics is also available. Can this be resolved in ...
0
votes
2answers
45 views

Possible to charge a phone battery by using built in contacts? [closed]

Recently I had a Plum Coach Plus II handed down to me because a family member broke the charger port on the device. I managed to charge it after a few minutes of propping and plugging in the cable ...
1
vote
3answers
211 views

How to autoregulate a TP4056 for maximum solar power extraction

I'm using a solar panel (6V - 600mA at peak power) to charge a Li-Ion (3.7V) battery using a TP4065. The TP4065 I'm using has this configuration: Where the value of the resistor Rprog determines ...
1
vote
0answers
26 views

Creating a switch between USB and USB OTG for phones [duplicate]

I'm trying to create a charger that knows how to switch between OTG and charging mode. The OTG side is working, and my Samsung S4 goes into charging mode. However, charging is really slow. It even ...
1
vote
2answers
50 views

Do chargers use power when they're not charging? [duplicate]

1) If I connect my mobile charger to a wall socket and it is switched on, but I don't connect my mobile to the charger, does the charger still use electricity? 2) If I connect an extension box to a ...
2
votes
1answer
77 views

how can I hack a usb charger to work with ALL phones and specifications

perhaps I am asking for too much. Please do tell. So I have a few usb chargers laying around. I realised that in these chargers I can charge iPhones and I can ...
-1
votes
1answer
48 views

What is “ol plug-it-in” as a charge approach?

I'm reading an article which is about wearable smart watches. In the following context author says Sony SmartWatch 3 uses ol' plug-it-in approach for charging, I ...
0
votes
0answers
117 views

Solar charge controller circuit for LiFePO4 (or possibly NiMH batteries)

Would someone happen to know of a circuit board for charging LiFePO4 batteries from solar panels. Or alternatively a simple circuit schematic for building one? I would like to use 2 LiFePO4 ...
0
votes
1answer
154 views

Li-ion 3s balancing charging using a TP4056 with protection OR use other charger and a protection

Trying to make a little powerpack for my boat with old 18650 cells. A am planning on a 1 kwh pack, so charging each cell indivually is not an option... I have planned to set up 10 packs of 4 ...
0
votes
0answers
25 views

Female USB charger in a car [duplicate]

I want to build a charger via USB in my car. I have a female USB but I want to know how to make this. I don't know how USB works for charging. I have also a cigar lighter in my car and a charger. ...
1
vote
1answer
107 views

Charging li-ion cell using constant-voltage only

Introduction Various resources [1] [2] state that the optimal method of charging a li-ion cell -- such as one found in a mobile phone -- is to charge at a constant current (usually <1C) until a ...
0
votes
1answer
85 views

How to Simply Lower Current in Circuit and Maintaining Voltage?

A charger with a transformer is putting out 12.6V and runs at 5A when I plug in the battery as the bat is fairly empty (10V of 12). I would like to limit the current to 2A. I tried a 5ohm 5 watt ...
0
votes
0answers
31 views

Grounding A Circuit of a Power Tool Battery Charger to Use as Car Battery Charger [duplicate]

I took a charger that matches what I need to charge a car battery. The charger uses a transformer and has 3 connections, as does the battery it's intended for (+/-/T). When I plug the + and - alone ...
0
votes
2answers
99 views

Modifying a Simple Transformer Circuit

I have a heavy 14.4V 1.5A heavy battery charger I would like to use to charge my car battery (over time, monitored for heat in a well ventilated area). When I plug the battery to the charger as is, ...
0
votes
1answer
119 views

USB charging at 4.3 volts

I'm trying to create a charger that knows how to switch between OTG and charging mode. The OTG side is working, and my Samsung S4 goes into charging mode. However, charging is really slow. It even ...
0
votes
1answer
66 views

Rewiring a 12V charger

I have a Windows tablet with a charger which crapped out. The old charger was 12V / 1.5A - fairly standard but it had a rare tiny pin connector. Rather than buy a new charger, I decided to cannibalise ...
2
votes
1answer
200 views

Best Option for Charging a High Voltage Capacitor?

I was looking for a good option to charge my 450V 6800uF Electrolytic Capacitors. I initially followed the dc - dc booster path with a voltage divider comparator (op-amp) something similar to But ...
1
vote
0answers
101 views

Smart Battery Charger with BQ24450

I am a newbie and need help in designing a smart battery charger with BQ24550 here are some details mentioned. Battery pack has 4 Lead Acid batteries (Panasonic LC-R064R5P) 6V 4.5Ah connected in ...
0
votes
0answers
59 views

Plugging battery backup and AC/DC converter into the same battery

Today, I took one of the UPS (UPS A) the battery out and directly plugged it to bigger 12V battery (so if the electricity is out it stays long). And I also have AC/DC 2000Watt inverter. That inverter ...
0
votes
1answer
175 views

SIM908 Li-Ion charging with 6V solar panel

So, I want to know if I can hook up a 6V 2 watt solar panel to the Vchg pin on a SIM908 gsm/gps module and trickle charge my 6Ah LiPo battery that way. A little background... So, I have completed ...
0
votes
0answers
91 views

Trying to create a USB dongle with OTG and charging capabilities

I'm trying to create a USB-OTG dongle that can pretty much do this: http://accessories.dell.com/sna/productdetail.aspx?c=us&cs=19&l=en&sku=470-abes That's the Dell Micro USB Dongle for ...
0
votes
1answer
114 views

How are these AA batteries 4500 mAh?

I found these two batteries in a drawer while looking for batteries for my wireless mouse. I was surprised to see that they are 4500 mAh, which is much higher than any AA battery I could find on the ...
0
votes
2answers
90 views

How does this wireless charger work?

I want to understand the way this circuit works. The following are diagrams of the transmitter and receiver of a wireless iPod charging circuit. I have added a link to the instructable that describes ...
0
votes
1answer
167 views

LM317 3.7 v battery charger

I have build simple LM317 power supply.Input is 12v (I am using computer power supply), and the output is around 4v .I was ...
0
votes
4answers
100 views

Circuit Validity

The following is a circuit I have tried simulating on multisim. The LED on the transmitter part does not light up. The current is 0 through that LED. Is it legitimate?
-1
votes
1answer
109 views

Lost in desert - charge the phone with car battery [closed]

First of all I'm not a student nor a engineer. Pretend I'm lost in the desert with just a car with a broken engine. The battery of my phone is over. Is there any chance I can survive (charging the ...
1
vote
1answer
93 views

Power a laptop LED backlight with NiMH batteries

I'm powering a laptop LED backlight with an external 24,8V power supply, because I have problems with the internal WLED driver. The display used to work at 27V, but with the 24,8V of the power supply ...
0
votes
2answers
124 views

High Cell Count LiPo Balancer/Charger

How would I go about balance charging either 100 or 75 lipo cells? This is a very serious question by the way, it's for an electric vehicle and we use either 75 or 100 cells at a go and currently ...
0
votes
2answers
112 views

mobile battery charging using voltage regulator?

Circuit shown at http://www.instructables.com/id/9v-USB-charger/ will that satisfy all condition of mobile charging through usb ? what is advantage of circuit shown at ...
-1
votes
1answer
908 views

Turn Laptop Battery to a Power Bank

Is it possible to turn a laptop battery into a power bank? I have seen video tutorials and articles on how to turn AA Batteries into power banks, however, no one has created a power bank using a ...
-1
votes
1answer
118 views

We're making a bike-powered USB charger and we have (almost) no idea what we're doing

So my friend and I are going to build a USB charger powered by a dynamo. Here is a diagram of what we are planning to do. I have a few questions: 1.) How do we test if the dynamo and breadboard ...
-1
votes
1answer
89 views

Need to make a laptop charger [closed]

I am not an electrician. My laptop's charger burned when we had high voltage 2 days ago. My laptops charger says Output is: 19.5 V and 9.23 A. I am in a country that you can't easily find those kinds ...
0
votes
2answers
167 views

5 volt generator

first time question, and not much of an electrical guy. so please be patient. My dad however, is an electrical engineer, who loves little goofy gadgets as most engineers do. For Christmas I want to ...
0
votes
1answer
111 views

Charge a Lipo battery and power a circuit

I purchased this LiPo charger and I plan to connect the GND and BAT connections to the battery and an external circuit at the same time. In the datasheet the reference drawings are for battery ...
1
vote
1answer
55 views

Charging appliances with chargers of different amperage (safety & duration)

Safety Will the battery or charger be damaged if I use a 1A charger to charge a 2.1A appliance? Will the battery or charger be damaged if I use a 2.1A charger to charge a 1A appliance? Duration I ...
1
vote
1answer
84 views

Identifying a four-pin IC labelled EL 8+7 G8025

I want to know the purpose of a component named "EL 8+7 G8025" which was found inside a Nokia charger.
0
votes
1answer
147 views

lm2596 fixed 5 volts(usb) from 12v 10W solar panel

I have got a 10 Watt solar panel & a 10000 mha Battery bank. I plan to use the panel to charge the battery bank. I have a LM2596(variable configuration with pot), I plan to use it to charge my ...